Replacing my WC - should I get my soil pipe replaced too?

[philistine2]

I'm looking to replace my toilet in my 1970's build flat but I think I'll have a serious issue with the way the toilet is currently set up.

I have a very old very disgusting cast iron soil pipe coming through the floor by around 3-4 inches which is connected to my toilet via a plastic connector. Some seal of sorts has been used to make these two fit together - looks like a very makeshift job to me. The cistern is 6 inches from the wall and there is a box to hide the gap.

The respective diameters of the soil pipe and standard toilet connectors are always going to be different yes? Therefore would it be worthwile getting a professional in to replace the section of soil pipe with a PVC one so I can straightfowardly fit a new WC and connector to it? Any idea what the costs would be?

The only alternative would be to try and fit a smaller plastic WC connector into the larger diameter soil pipe but I'm not sure how that could be done and whether it would be worth the headache. It would also require a new box to box in and hide the unsightly soil pipe.

Any advice would be much appreciated

 

[terryplumb]

Is the floor concrete ?

 

[footprints]

https://www.ebay.co.uk/itm/MAC-3-Ca...ast-Inside-Diameter-approx-80mm-/251336366230

Leave the cast alone it will go the rest of the way in cast so you would need a rubber adaptor anyway, very bulky and more joints to leak.
https://www.toolstation.com/flexible-connector/p25396

 

[footprints]

Clean up the inside of the old pipe as much as possible, I used a flat wire brush on a drill for final finish. ONLY START AND STOP THE DRILL WHEN IT IS IN THE PIPE!

 

[philistine2]

Is the floor concrete ?

It's got wooden floorboards. beneath that I'm not 100% sure of the construction but I think it's just wooden joists and cavities

 

[philistine2]

https://www.ebay.co.uk/itm/MAC-3-Ca...ast-Inside-Diameter-approx-80mm-/251336366230

Leave the cast alone it will go the rest of the way in cast so you would need a rubber adaptor anyway, very bulky and more joints to leak.
https://www.toolstation.com/flexible-connector/p25396

Thanks, so would the first connector linked be sufficient to use with a toilet connector or would I need the second also? or is the second what a plumber would use to connect to a pvc pipe?

Also is there anything I could use to conceal the soil pipe without getting a joiner to make some kind of box for me?

 

[footprints]

Ist should connect direct to pan assuming you do not need to extend the pipe. The second is from pvc pipe to cast as you say. I boxed mine in.

 

[philistine2]

I will need to extend it as the toilet will not reach the cast iron pipe

 

[footprints]

various extenders are available best to pop into a merchant and get their advice on the right bits.

 

[philistine2]

https://www.ebay.co.uk/itm/MAC-3-Ca...st-Inside-Diameter-approx-80mm-/251336366230?

Looking at this connector again it seems that it might not work on my soil pipe as it's wider than the 110mm WC connector I have at the moment.

 

[footprints]

It's the bottom end that will be narrower the fins are tapered to let it fit in the smaller cast, the one fitting the pan will be the same on all modern wc's inside even if the outer varies by maker.
Should come with a pack of grease, only grease the cast end not the pan end just use water to lube that.

 

[philistine2]

Okay so I can use the mac-3 cast iron connector along with this? https://www.screwfix.com/p/mcalpine-wc-f26r-flexible-wc-pan-connector-white-97-107mm/71219

cast iron connector goes inside soil pipe, then flexi wc connector connects this to the toilet itself?

should mention the WC outlet and soil pipe are at right angles to each other